A comparison of ultraviolet and visible Raman spectra of supported metal oxide catalysts was presented. Spectra from the oxides, both hydrated as a result of contact with ambient air and dehydrated as a result of calcination of laser-induced heating, were recorded. Strong absorption by the samples in the ultraviolet reduced the number of scatterers contributing to the Raman spectrum while producing only modest increases in the Raman scattering cross section due to resonance enhancement. The result was much lower signal levels with ultraviolet excitation compared to visible wavelength excited spectra.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry